<template>
  <el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse" background-color="#545c64" active-text-clolr="#ffd04b" text-color="#fff">
    <h3>{{isCollapse ? '后台' : '通用后台管理系统'}}</h3>
    <el-menu-item @click="clickMenu(item)" :index="item.path" v-for="item in noChildren" :key="item.path">
    <i :class="'el-icon-' + item.icon"></i>
    <span slot="title">{{item.label}}</span>
  </el-menu-item>
 <el-submenu :index="item.path" v-for="item in hasChildren" :key="item.path">
    <template slot="title">
      <i class="'el-icon-' + item.icon"></i>
      <span slot="title">{{item.label}}</span>
    </template>
    <el-menu-item-group v-for="(subItem,subIndex) in item.children" :key="subItem.path">
      <el-menu-item @click="clickMenu(subItem)" :index="subIndex.toString()">{{subItem.label}}</el-menu-item>
    </el-menu-item-group>
  </el-submenu>
</el-menu>
</template>

<script>
export default {
   data() {
      return {
        menu:[
          {
            path:'/',
            name:'home',
            label:'首页',
            icon:'s-home',
            url:'Home/Home'
          },
          {
            path:'/mall',
            name:'mall',
            label:'商品管理',
            icon:'video-play',
            url:'MallManage/MallManage'
          },
          {
            path:'/user',
            name:'user',
            label:'用户管理',
            icon:'user',
            url:'UserManage/UserManage'
          },
          {
            label:'其他',
            icon:'location',
            children:[
              {
                path:'/page1',
                name:'page1',
                label:'页面1',
                icon:'setting',
                url:'Other/PageOne'
              },
              {
                path:'/page2',
                name:'page2',
                label:'页面2',
                icon:'setting',
                url:'Other/PageTwo'
              }
            ]
          }
        ],
      };
    },
    methods: {
      handleOpen(key, keyPath) {
        console.log(key, keyPath);
      },
      handleClose(key, keyPath) {
        console.log(key, keyPath);
      },
      clickMenu(item) {
        this.$router.push({
          name:item.name
        })
        this.$store.commit('selectMenu',item)
      }
    },
    computed:{
      noChildren() {
        return this.menu.filter(item => !item.children)
      },
      hasChildren() {
        return this.menu.filter(item => item.children)
      },
      isCollapse() {
        return this.$store.state.tab.isCollapse
      }
    }

}
</script>

<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
.el-menu{
  height:100%;
  border:none;
  h3{
    color:#fff;
    text-align:center;
    line-height:48px;
  }
}
</style>